<template>
    <div class="upload-container">
        <el-button 
            :style="{background:color,borderColor:color}" 
            icon="el-icon-upload" 
            size="mini" 
            type="primary" 
            @click=" dialogVisible=true">上传图片
        </el-button>
        <el-dialog :visible.sync="dialogVisible">
            <el-upload
                :multiple="true"
                :file-list="fileList"
                :show-file-list="true"
                :on-remove="handleRemove"
                :on-success="handleSuccess"
                :before-upload="beforeUpload"
                class="editor-slide-upload"
                action="https://httpbin.org/post"
                list-type="picture-card">
                <el-button 
                    size="small" 
                    type="primary">点击上传</el-button>
            </el-upload>
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button 
                type="primary" 
                @click="handleSubmit">确 定</el-button>
        </el-dialog>
    </div>
</template>

<script>
// import { getToken } from 'api/qiniu'

export default {
    name: 'EditorSlideUpload',
    props: {
        color: {
            type: String,
            default: '#1890ff',
        },
    },
    data() {
        return {
            dialogVisible: false,
            listObj: {},
            fileList: [],
        };
    },
    methods: {
        checkAllSuccess() {
            return Object.keys(this.listObj).every(item => this.listObj[item].hasSuccess);
        },
        handleSubmit() {
            const arr = Object.keys(this.listObj).map(v => this.listObj[v]);
            if (!this.checkAllSuccess()) {
                this.$message('请等待所有图片上传成功 或 出现了网络问题，请刷新页面重新上传！');
                return;
            }
            console.log(arr);
            this.$emit('successCBK', arr);
            this.listObj = {};
            this.fileList = [];
            this.dialogVisible = false;
        },
        handleSuccess(response, file) {
            const uid = file.uid;
            const objKeyArr = Object.keys(this.listObj);
            for (let i = 0, len = objKeyArr.length; i < len; i++) {
                if (this.listObj[objKeyArr[i]].uid === uid) {
                    this.listObj[objKeyArr[i]].url = response.files.file;
                    this.listObj[objKeyArr[i]].hasSuccess = true;
                    return;
                }
            }
        },
        handleRemove(file) {
            const uid = file.uid;
            const objKeyArr = Object.keys(this.listObj);
            for (let i = 0, len = objKeyArr.length; i < len; i++) {
                if (this.listObj[objKeyArr[i]].uid === uid) {
                    delete this.listObj[objKeyArr[i]];
                    return;
                }
            }
        },
        beforeUpload(file) {
            const _self = this;
            const _URL = window.URL || window.webkitURL;
            const fileName = file.uid;
            this.listObj[fileName] = {};
            return new Promise((resolve /*, reject*/) => {
                const img = new Image();
                img.src = _URL.createObjectURL(file);
                img.onload = function() {
                    _self.listObj[fileName] = {
                        hasSuccess: false,
                        uid: file.uid,
                        width: this.width,
                        height: this.height,
                    };
                };
                resolve(true);
            });
        },
    },
};
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
.editor-slide-upload {
    margin-bottom: 20px;
    /deep/ .el-upload--picture-card {
        width: 100%;
    }
}
</style>
